There is some great information on this site. As a personal testimonial... well, I'll wait to share the breast story

http://www.breastnotes.com/aware/aware-bra.shtml

Another thing, for the women who have painful bouncing when they run, there is a company called Title9 who makes women's clothing. They have the ultimate sports bra, compresses you for NO movement so you almost feel like you have no breasts at all.

http://www.titleninesports.com/

I have no associations with this company, just trying to offer a solution for the runners with breast pain.

Take care!
Meg